Isaac pitman



ISAAC PITMAN, OF PROVIDENCE, RHUDE ISLAND.

THERMO-CIRCU LATIN@ VIENTILATOPI.

Specification forming part of Leiters Patent No. hfltfitil, dated November S, 1864.

To all whom it may concern:

Beit known that I, ISAAC PrrMAN, of Providence, in the county of Providence and State of Rhode Island, having invented a new and useful mode of ventilating the atmosphere of dwelling and other houses, apartments, Ste., do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and the letters of reference marked thereon.

Said drawings exhibit a thorough mode of heating the apartments of adwelling-house, aid embrace modes already known and in use, a force for ventilation being required, and heat as a ventilating force being necessary. It is through these, by the peculiar and novelapplication and use ot' them I make,

that l attain the object sought, which is thoroughly to ventilate a house or its apartinents, making asaving of heat, obviatingthe difiiculty of overheating, and producing a pure, genial, and pleasant atmosphere.

Now, in order to effect my purpose aforesaid, I connect and combine the air of an ,apartment or apartments with the air of a heated or furnace air-chamber, by having a tube or conductor or conductors, A, with a register at the upper end, as at B, leading d )wn to the bottom of said air-chamber, as at U, and there entering said chamber through the bottom, or on a level with the same, for the purpose of creating a continuous and circuitous current, without diversion, interruption by or contact with any falling or counter current or currents.

Having made, by the means in the manner stated, the atmosphere of an apartment to be in a continuous and circuitous circulation and motion,and thereby of a uniform or nearly uniform temperature, sufficiently so for my purpose., I am enabled to ventilate, and do ventilate, thereby an apartment as well at a point of altitude near the ioor, as at II, as at the ceiling at I.

YVhen the outside air is very cold and the air of the apartment is very warm-that is, when there is the greatest difference-I have the aperture for the out'liowing of the warmer air, down to its lowest point of altitude, as at II, and alternate my point of ventilation between the point II andthe point I, in common use, to correspond to the varying differences between the outside air and the air inside, said ventilating-apertures being each covered with a register and connected with a tube or diiferent tubes or conductors, as L, leading in a constantly vertical direction, or otherwise, to the attic M, to the open air, or to the space N, around the smoke-pipe O, thereby to obtain a greater force and rapidity of ventilation.

I replace the air carried oft' by ventilation in the ordinary manner of conducting` the outer air (see I I?) into the heated air-chamber, as into the furnace airchamber in common use, but always by introducing said air at, or under, or through the bottom of said chamber, and regulating it to correspond to the operating ventilating force at the time, as may be required.

Over the furnace air-chamber in common use, or above the same in altitude, I erect an upper air-chamber to be heated from said furnace and connect the air of the apartments above with said upper ainchamben (see S V X,) in the same way as heretofore described, (sec B A 0,) by entering at or through the bottom ofthe same, and for the same purposeviz.,to enable me to ventilate at any point of altitude I may choose, as before deserib d 5 or I connect the air of said rooms above with the lower air-chamber in the same way, as circumstances may dictate.

This continuous circuitous circulation ofthe air, giving the power of Ventilating at a low point of altitude, as aforesaid, prevents the accumulation of impure air by carrying it Off as fast as produced, without decreasing the uniform heat and comfort of the apartment, as when ventilated in the common way without this circuitous circulation. It combines an economy of fuel, uniform temperature, and purencss of air not otherwise or before attained.

VhatIclaim, and desire to secure by Letters Patent, is-

l. rIhe cireuitous circulation ot' thc air of an apartment, from the 'licor of the same through a heat-ed air chamber by entering at the bottom of said chamber and passing through in a continuous current, without contact with any falling or counter current, back into said.

apartment again, for the ultimate purpose 0r near the tloor, in combination with the cirof ventilation at a 10W point of altitude, close euitous circulation ofthe air, by the means and to the loor, by the uniform temperature acquired in consequence ot' the complete circulation of the air, in the manner and `by the means herein described.

2. The ventilation of an apartment at a 10W point of altitude by a ventilatirig-aperture at in tlle manner described herein.

ISAAC PITMAN.

Witnesses:

HENRY PITMAN, JOSEPH S. PITMAN. 

